arm64: defconfig: Enable CMA debug configs on Lahaina

Enable CMA_DEBUGFS and CMA_DEBUG on Lahaina debug builds to collect
information about CMA statistics/allocation times through
DEBUGFS.

Change-Id: Iae10513210c85ad32101720b9ee57ac5fe49d6fb
Signed-off-by: Isaac J. Manjarres <isaacm@codeaurora.org>